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Design strategy of car wiring harness overlap

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Design strategy of car wiring harness overlap

There are more and more electrical appliances installed in the car, which makes the connection points and wires on the whole car more and more.

There are more and more electrical appliances installed in the car, which makes the connection points and wires on the whole car more and more. In wire harness design, how to ensure reliable wiring of electrical equipment is an important issue. In the design process, the grounding point and grounding line must be reasonably designed according to the characteristics and functions of the automotive electrical appliances to ensure the good working condition of the automotive electrical appliances to the greatest extent.

Electric appliances in the car are connected in parallel, and all circuits are positive and negative circuits. Most of the positive lines of the battery are directly connected to the electrical appliances, the negative line of the battery is directly connected to the engine and the metal parts of the body, and the negative lines of the electrical appliances are directly connected to the engine and the metal parts of the body through the wiring harness. The engine and the metal parts of the body are used as public channels. Return to the negative line of the battery to form a closed loop. The metal parts that are negatively connected to the engine and the fuselage are called iron blocks, and are commonly referred to as grounding. The negative line inside the car is usually called the ground line.

In the circuit of the whole vehicle, the lap iron is very important for the circuit of the whole machine. The quality of the grounding line is very important to the work of automobile electrical appliances. The grounding points on the car are widely distributed, mainly concentrated in the dashboard tube beam, car body floor, front cabin and other parts. Some parts are easy to be stained with mud, oil or rust. These conditions may lead to poor grounding, resulting in Function failure. For example, the body of the grounding point is painted, the fastening bolts of the engine grounding wire are loose, or the corrosion resistance of the grounding point is increased, etc., these will cause poor grounding and seriously affect the normal use of the equipment. Therefore, the wiring harness overlap design must ensure its reasonable and good performance.

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